The Adventures of Paddington Bear (1997)

Season 1: Episode 22

It's Mr. Brown's birthday and, in his attempt to raise enough money to send him a telegram, Paddington takes a job as a model for a painting class. But our little hero quickly discovers that standing stock still for hours on end is not only frightfully boring, but leg-numbing as well. At Mr. Gruber's suggestion, he forgets about the telegram and gives Mr. Brown a singing telegram instead.